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<title>Using as: AArch64-Relocations</title>

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<a name="AArch64_002dRelocations"></a>
<div class="header">
<p>
Previous: <a href="AArch64_002dRegs.html#AArch64_002dRegs" accesskey="p" rel="prev">AArch64-Regs</a>, Up: <a href="AArch64-Syntax.html#AArch64-Syntax" accesskey="u" rel="up">AArch64 Syntax</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="Relocations"></a>
<h4 class="subsubsection">9.1.3.3 Relocations</h4>

<a name="index-relocations_002c-AArch64"></a>
<a name="index-AArch64-relocations"></a>
<a name="index-MOVN_002c-MOVZ-and-MOVK-group-relocations_002c-AArch64"></a>
<p>Relocations for &lsquo;<samp>MOVZ</samp>&rsquo; and &lsquo;<samp>MOVK</samp>&rsquo; instructions can be generated
by prefixing the label with &lsquo;<samp>#:abs_g2:</samp>&rsquo; etc.
For example to load the 48-bit absolute address of <var>foo</var> into x0:
</p>
<div class="smallexample">
<pre class="smallexample">        movz x0, #:abs_g2:foo		// bits 32-47, overflow check
        movk x0, #:abs_g1_nc:foo	// bits 16-31, no overflow check
        movk x0, #:abs_g0_nc:foo	// bits  0-15, no overflow check
</pre></div>

<a name="index-ADRP_002c-ADD_002c-LDR_002fSTR-group-relocations_002c-AArch64"></a>
<p>Relocations for &lsquo;<samp>ADRP</samp>&rsquo;, and &lsquo;<samp>ADD</samp>&rsquo;, &lsquo;<samp>LDR</samp>&rsquo; or &lsquo;<samp>STR</samp>&rsquo;
instructions can be generated by prefixing the label with
&lsquo;<samp>:pg_hi21:</samp>&rsquo; and &lsquo;<samp>#:lo12:</samp>&rsquo; respectively.
</p>
<p>For example to use 33-bit (+/-4GB) pc-relative addressing to
load the address of <var>foo</var> into x0:
</p>
<div class="smallexample">
<pre class="smallexample">        adrp x0, :pg_hi21:foo
        add  x0, x0, #:lo12:foo
</pre></div>

<p>Or to load the value of <var>foo</var> into x0:
</p>
<div class="smallexample">
<pre class="smallexample">        adrp x0, :pg_hi21:foo
        ldr  x0, [x0, #:lo12:foo]
</pre></div>

<p>Note that &lsquo;<samp>:pg_hi21:</samp>&rsquo; is optional.
</p>
<div class="smallexample">
<pre class="smallexample">        adrp x0, foo
</pre></div>

<p>is equivalent to
</p>
<div class="smallexample">
<pre class="smallexample">        adrp x0, :pg_hi21:foo
</pre></div>




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